2585427866 has 24 divisors (see below), whose sum is σ = 4523466420. Its totient is φ = 1105054272.

The previous prime is 2585427863. The next prime is 2585427883. The reversal of 2585427866 is 6687245852.

It can be written as a sum of positive squares in 2 ways, for example, as 2564916025 + 20511841 = 50645^2 + 4529^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2585427863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1190 + ... + 71918.

Almost surely, 2^2585427866 is an apocalyptic number.

2585427866 is a deficient number, since it is larger than the sum of its proper divisors (1938038554).

2585427866 is a wasteful number, since it uses less digits than its factorization.

2585427866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71118 (or 71111 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 53.

The square root of 2585427866 is about 50847.1028279881. The cubic root of 2585427866 is about 1372.4951184018.

The spelling of 2585427866 in words is "two billion, five hundred eighty-five million, four hundred twenty-seven thousand, eight hundred sixty-six".